.rt-input-addons-container {
  // border: 1px solid red;
  // 原生的 css without prefix to name class name
  .InputAddOn {
    display: flex;
    margin-bottom: 1.5em;
  }

  .InputAddOn-field {
    flex: 1;
  }
  .InputAddOn-field:not(:first-child) {
    border-left: 0;
  }
  .InputAddOn-field:not(:last-child) {
    border-right: 0;
  }

  .InputAddOn-item {
    background-color: rgba(147, 128, 108, 0.1);
    color: #666666;
    font: inherit;
    font-weight: normal;
  }

  .InputAddOn-field,
  .InputAddOn-item {
    border: 1px solid rgba(147, 128, 108, 0.25);
    padding: 0.5em 0.75em;
  }
  .InputAddOn-field:first-child,
  .InputAddOn-item:first-child {
    border-radius: 2px 0 0 2px;
  }
  .InputAddOn-field:last-child,
  .InputAddOn-item:last-child {
    border-radius: 0 2px 2px 0;
  }
  // use less to refactor
}